简便计算
3/8×8÷3/8×8
4/7 × 5/9 + 3/7 × 5/9
5/2 -( 3/2 + 4/5 )
6 ×( 1/2 + 2/3 )
8 × 4/5 + 8 × 11/5
31 × 5/6 – 5/6
4/5 × 25/16 + 2/3 × 3/4
101 × 1/5 – 1/5 × 21
(6.8-6.8×0.55)÷8.5
0.12×4.8÷0.12×4.8
(58+37)÷(64-9×5)
812-700÷(9+31×11)
120-36×4÷18+35
(284+16)×(512-8208÷18)
9.72×1.6-18.305÷7
12.78-0÷( 13.4+156.6 )
37.812-700÷(9+31×11)
(136+64)×(65-345÷23)
3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26)
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
(284+16)×(512-8208÷18)
0.12× 4.8÷0.12×4.8
(3.2×1.5+2.5)÷1.6